The driver of the car was in serious condition, while the truck driver was unscathed.

Weather, road conditions and driver experience are all being looked into as factors.

A single-vehicle crash left a woman dead on Highway 99 in Richmond just after midnight Sunday, after she drove off the road, hit a highway sign and ended upside down and partially submerged in a water-filled ditch.

Weather, road conditions and driver experience are also being considered as factors in the crash.